Kalakan (Pashto, Dari: کلکان; , ) is a village located in the center of Kalakan District, Kabul Province, Afghanistan. Notable People of Kalakan Habibullāh Kalakāni, Afghan revolutionary leader who
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387ab4b1fffa7d02a4b6fd06dce7da14931556f517321d4543b5ffd46b2e70b2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/575c88b1-7f53-4e05-a84f-e0cd40d461ff.json and https://artists.proofprofile.net/proofs/artist/575c88b1-7f53-4e05-a84f-e0cd40d461ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495668a6b01f08b0111677b689b56201d9f2a8b8a433c2df9cf7b5a7da33810d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITP901000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8603adf5d704d621c94c15c1ba28c07d26195484e505c134b310064ea3e6cf. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITP901000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287e9de9f32b0dc9317abfcd44124828f684f5060968579901c8d5a94afe538d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITP901000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be9cce6bca72cfe98e799bf64d87b831b90ff6512b37cc7e449b99c9bd52495. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITP901000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a4b505456810044ccc0bad43e08d29e3f08f6d213cb6fd351224c8e6c6339a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceea74363d7a7400883deb18e2c14762525bec86bd1f1c346c62c9b39c12c7b5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4738d76b0936dba031a8fa51186ff664779615936de075b0e44982db00a9f79b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d3630b8a7bbf2f24c5919d8f297e43346514df218e6dd6763a0c5b48c3d405. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f095375f9ae6edbd190460258deff4e906a9de0cd544dac09997277f966fe2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64994c2c9cb9aa534464cfabda7a582fb9b97ee2c6d648a09e112230a2dcce5b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3328a6730fa527923be8d3f39ebeabacab6cb067dfb0e574505744fd642299. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951741f044b586c7911ff61d80bd993542765ffc94af5728570bdd01eb6d119d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe84ee98979f46704613385d8d44b1b132c62255159a48e8c17104cc19a55fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a6ab8194e9dafaa9539007177772fa742b607a2b04578dda786eba88cca56d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148e882c11fff97e10f7ecd1f1a706a14d954d8f656293f56de5738092841f9a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6434272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecec45d45a8b82f2f4fed7c83c6f32f680932bddcad20eeaf47e1bded9ec59d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2452277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27570aa982187b4ea00dcbc5615f86a010dc0d7df6062a3f27cecf1c9d161699. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5591101642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f82856e520a19b53c1a9167a21445010271036afcf878cc253a2aa1bfff8fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5591101641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d6ff910be34cb86cce62d874853c93caf3ad3886c09cb5595ac3ed80c2be5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA081400750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d061edee5d40ba399934e0248c8032fa3f83c7fea211f88a5f77915356f5f94. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES21A2400031.